How to make fram MCU faster and need the lowest power consumption

Time:2021-1-28

Why can MCU with fram have many advantages? For example: Ti has done an experiment. If it needs to write 13kbps data to DRAM, it will take 1 second, about 2200ua power consumption to do the writing function. But if it uses fram, it only needs 10ms, 9ua to finish the data writing. Through comparison, we can see that if you want to write a lot of data to flash and other traditional memories, fram will be faster and the power consumption is the lowest.

 

In terms of the number of erasing and writing data, generally, the memory can write 10000 times to the limit, but fram can continue to erase and write after writing 10 times. becauseFRAMThe speed is almost the same as that of SDRAM. In the whole MCU architecture, Ti makes an integrated class selection, that is, 16 frams are placed in one MCU. At this time, fram can be used as SDRAM, flash and EEPROM. In this way, the overall memory is more efficient and convenient to use. This is a new MCU storage technology.

 

In the application layer, where is fram suitable for? The advantages of FRAM applied to sensors can be clearly reflected. Fram can quickly record the data obtained by sensors. If it is done with flash, it will take a long time to write the data. After reading the sensor data, it will be written again. Repeated intermittent reading and writing actions make each data point separate, which can not achieve the continuity of data reading and writing. In the application of radio frequency, flash power consumption will rise very high because of the speed limit. If we use fram to read and transmit at high speed synchronously, it can save time and greatly reduce power consumption.

 

For example, in the sensor data recording, due to the power consumption of other storage media, the location of the sensor should be limited, which increases the maintenance cost. And fram is the best choiceMCUThrough energy collection technology, more sensors can be placed in more locations.

 

At present, flash is widely used in MCU storage medium, so fram is suitable for MCUMemory flashThe advantage of Ti is regarded as the first object of comparison. For example, limited data update / write speed and continuous and reliable monitoring, storage and RF transmission; selective monitoring and continuous monitoring; battery life up to 1 month and less than 6 hours: data block level erasure and programming and bit level access; need for redundant (mirror) memory blocks and ensuring write operation in case of power loss.